Shay Mitchell's Must-Have Products: From a Béis Carry-On to Her Favorite Sheets

Mitchell drinks Hydralyte Lightly Sparkling ($25) often, including while traveling and working out. She loves the fizziness and shares that her favorite flavor is Lemon Squeeze. "It's just like a little add to my water that just makes the flavor a million times better, and it's also a lot more hydrating, and it's something now I do with my girls, too," she says.

She even found it useful when she was expecting. "When I was pregnant the first time and I wasn't using Hydralyte as regularly, I got a lot more Charley horse cramps in my feet, and that's a very common thing when you're pregnant."

Pro Tip: It also comes in tablet form, which is more convenient for travel.